All the diseases which afflict a person are the result of agitations in the mind. The enormous growth of disease in the world today is due to the loss of peace of mind. The mind has three kinds of capabilities. One is Anekagrata (a wandering mind). Another is Sunyata (vacancy, emptiness) and the third is Ekagrata (single-pointed concentration). Sunyata is the state in which the mind goes to sleep when something edifying is being said. The mind is unresponsive to what is good and beneficial. Such a state of mind is called Tamasic (slothful). It is the blindness of ignorance. Anekagrata is an equally undesirable mental state. It too is degrading; the mind is like the turbulent Ganga. It has to be restrained by the use of brakes, as in a fast-moving vehicle. Dhyana (meditation) is the brake devised for the control of the mind. For one-pointed concentration, peace is most essential. (Divine Discourse Jan 14, 1988)